thats a BIG tablecloth..... 11 feet by 17feet?????
we use 2 and just overlap when need be. Maybe 2 60"x102" would work for you? (60x102 seems to be a "normal" size)
I found this:
www.ebay.com
in search box, type 4335441611
(I couldnt get the url link thing to work, so I just gave you the item number to look it up by)
says the color is "ecru" which means natural or ivory and there are 7 of them available. Maybe you could buy 2?????